CN104131854A - Technique capable of continuously changing timing, phase and lift of valve of engine - Google Patents
Technique capable of continuously changing timing, phase and lift of valve of engine Download PDFInfo
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- CN104131854A CN104131854A CN201410279988.XA CN201410279988A CN104131854A CN 104131854 A CN104131854 A CN 104131854A CN 201410279988 A CN201410279988 A CN 201410279988A CN 104131854 A CN104131854 A CN 104131854A
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- shaft
- axle
- valve
- axle sleeve
- rocking arm
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Abstract
Disclosed is a variable valve technique capable of continuously changing timing, phase and lift of a valve. The technique includes that a lower shaft of a crankshaft is used as a fixed shaft to be fixed on a cylinder cover and is coaxial with a rocker arm roller when not doing work, an upper shaft of the crankshaft is used as a movable shaft, a shaft sleeve with an output cam is arranged on the upper shaft, two eccentric shafts are connected to the movable shaft and the shaft sleeve through connecting rods respectively, the eccentric shaft connected to the movable shaft is used as an adjusting shaft, the eccentric shaft connected to the shaft sleeve is used as a cam shaft, and the cam shaft rotates to drive the shaft sleeve to be in reciprocating motion through the corresponding connecting rod. The adjusting shaft rotates to drive the movable shaft of the crankshaft to move, and the cam shaft connected with the shaft on the movable shaft does not move relatively to the movable shaft, so that the shaft sleeve rotates oppositely to the cam shaft relatively to the movable shaft, rotation of the shaft sleeve enables the output cam to contact with the rocker arm roller in advance, the valve is opened in advance and closed in a delayed manner at the moment, timing is advanced, and phase is enlarged; reciprocating motion angle of the shaft sleeve is unchanged, so that the rocker arm roller moves for a more distance along the output cam, stroke of the valve becomes longer, and lift of the valve becomes bigger.
Description
Affiliated technical field
The present invention relates to engine valve and continuously change technology, particularly can change valve lift, port timing and valve timing simultaneously, and be the technology continuously changing.
Background technique
A current motor part is furnished with the technology valve timing of change, fraction can change lift but only limit two-part, only have few high-end vehicle to be just equipped with continuous variable valve phase place and lift technology, and motor is different in the needed air inflow of every speed, after particularly rotating speed improves, unalterable valve affects intake efficiency, now not only needs to increase valve opening stroke, also needs valve to increase phase angle and coordinates raising intake efficiency.The working efficiency that the raising of intake efficiency has not only improved motor, has also played important function to energy-conserving and environment-protective.
Summary of the invention
In order to overcome available engine great majority, can not change the deficiency of valve-control and lift, the invention provides a kind of engine continuous variable valve timing, phase place and lift technology, can in the different rotating speed of motor, continuously change timing, phase place and lift.
The technical solution adopted for the present invention to solve the technical problems is: with a bent axle, lower shaft is made dead axle, is fixed on cylinder cap, rotatable, the rocking arm roller concentric when not opening valve.Upper axle action shaft, is connected with an eccentric axle of adjusting by a connecting rod, and this is eccentric adjusts axle and use and adjust and the effect of fixed crankshaft moving axis.On moving axis, have axle sleeve, axle sleeve below is fixedly linked with output cam, and top connects another connecting rod, and this connecting rod is connected with the eccentric cam shaft of moving axis one side.Eccentric cam shaft is by timing chain driven rotary, and its rotation drives axle sleeve by connecting rod, and axle sleeve moves reciprocatingly, and by the output cam drive rocking arm of axle sleeve below, opens valve.The eccentric axle of adjusting can be driven by motor, it rotarily drives the motion of bent axle moving axis, and the eccentric cam shaft being connected with moving axis Upper shaft sleeve can not move with respect to moving axis, therefore axle sleeve can be to the contrary direction rotation of eccentric cam shaft with respect to moving axis, the angle of its rotation is adjusted axle by bias and is determined, the rotation of axle sleeve can allow output cam contact with rocking arm roller in advance, and now valve will be opened in advance and can be lagged and closes, therefore in advance, it is large that phase place can become in timing meeting.And the reciprocating angular dimension of axle sleeve is constant, so rocking arm roller can do more physical exercises one section along output cam, so valve stroke can be longer, and it is large that lift can become.
The invention has the beneficial effects as follows and increase as required valve stroke, reach the object that increases air inflow, change port timing, make intake and exhaust more smooth and easy, increase engine efficiency, plasticity is strong, and integral rigidity connects, and not affected by engine speed.
Accompanying drawing explanation
Fig. 1 is overall perspective view
Fig. 2 is each part
Fig. 3 adjusts bent axle
Fig. 4 is valve opening figure
Fig. 5 is axle sleeve stroke angles
Fig. 6 adjusts axial adjustment contrast
Fig. 7 is lift comparison diagram
Fig. 8 is rocking arm roller contrast before and after axle sleeve is adjusted
Fig. 9 is overall diagram
Figure 10 is the partition in cylinder cap
In figure, 1. eccentric cam shaft 2. camshaft connecting rod 3. axle sleeve 4. output cams 5. are adjusted the eccentric axle 7. rocking arm 8. rocking arm roller 9. hydraulic tappet 10. valves 11. adjustment bent axles 12. adjustment bent axle moving axis 13. of adjusting of connecting rod 6. and are adjusted bent axle dead axle
Embodiment
In Fig. 3, adjust bent axle and be designed to split typely, wherein moving axis part is as a whole, and dead axle and attachment portion are another integral body, design is easy to install like this, and because of bent axle for this reason only moving axis be subject to exert oneself, dead axle is fixed, be not subject to rotary torsion, so can rapid wear.At Fig. 1 Intermediate shaft sleeve (3) and adjustment connecting rod (5), be installed in bent axle moving axis (12) above, adjust connecting rod (5) the other end and connect eccentric adjustment axle (6), this axle effect is to fix and regulate bent axle moving axis.Axle sleeve (3) is connected with camshaft connecting rod (2), and camshaft connecting rod (2) the other end connects eccentric cam shaft (1).Output cam (4) under axle sleeve (3) is fixedly linked with axle sleeve (3).Below axle sleeve (3), have valve rocker (7); on rocking arm, have rocking arm roller (8); rocking arm roller (8) contacts with axle sleeve (3) all the time; and rocking arm roller (8) in the situation that of valve-closing with bent axle dead axle concentric; also can be round rocking arm roller (8) rotation when bent axle moving axis (12) is adjusted like this, and can not depart from.Below rocking arm, one end is valve, and the other end is hydraulic tappet.
In Fig. 4, when timing chain drives eccentric cam shaft (1) rotation, eccentric cam shaft (1) drives axle sleeve (3) to move reciprocatingly by camshaft connecting rod (2), and bent axle moving axis is owing to connecting the eccentric axle of adjusting, so now can not move, in the time of output cam (4) contact rocking arm roller (8), by rocking arm (7) unseat the valve.
In Fig. 5, the present invention is that for example air inlet phase angle is 230 degree with 360 degree rotations of the to-and-fro motion simulation camshaft of axle sleeve, and camshaft acting scope is 115 degree so, if axle sleeve take to-and-fro motion between 81.39 degree that axle center is the center of circle, so wherein 26 degree are expansion space stroke.If high engine speeds running, needs 270 degree phase angles, camshaft work done scope is 135 degree so, and axle sleeve needs 30.52 degree strokes to carry out work done.Reciprocating stroke 81.39 degree that ∠ aoc in Fig. 5 is axle sleeve, ∠ eoc is expansion space stroke 26 degree, and ∠ bod is the axle sleeve reciprocating stroke of adjusting to behind 270 degree phase angles, is 81.38 degree equally, and ∠ eod is 30.52 degree of working stroke after adjusting.Thus, the process that the reciprocating stroke of axle sleeve is adjusted to ∠ bod from ∠ aoc is exactly the process at 270 degree phase angles that become from 230 degree phase angles.
In Fig. 5, ∠ bod is rotated counterclockwise 4.52 degree and will overlaps with ∠ aoc.In Fig. 6, the eccentric axle (6) of adjusting is to right rotation, by connecting rod band dynamic crankshaft moving axis to right rotation, the impact that can not be adjusted of the position of eccentric cam shaft (1), so axle sleeve (3) is relative constant with the coupling shaft position of camshaft connecting rod (2), but bent axle moving axis has moved right, so axle sleeve with respect to bent axle moving axis to anticlockwise, when axle sleeve is spent with respect to bent axle moving axis axle center rotation 4.52, with regard to the ∠ bod quite and in Fig. 5, being rotated counterclockwise 4.52 degree overlaps with ∠ aoc, this process is just equivalent to phase angle and has adjusted to 270 degree by 230 degree, and eccentric adjustment axle is the position of adjusting gradually bent axle moving axis, therefore 270 degree are also adjusted to gradually by 230 degree in phase angle, so this process is exactly the process of continuous variable phase place.
When Fig. 6 Intermediate shaft sleeve (3) is rotated counterclockwise with respect to bent axle moving axis (12), the output cam (4) being fixedly linked with axle sleeve below axle sleeve also can be rotated counterclockwise, and can more early contact with rocking arm roller after its rotation.The left figure of Fig. 8 be before adjusting during low phase angle rocking arm roller opening point with turn back a little, the right figure of Fig. 8 be after adjusting during high phase angle rocking arm roller with respect to the position before adjusting, adjust front arm roller at valve opening point, and after adjustment, at this valve, open.Therefore valve can be opened in advance, at this moment will shift to an earlier date valve timing, with this, reaches the object of continuous variable timing, and this process namely Fig. 5 Intermediate shaft sleeve work done angle is increased to the process of ∠ eod by ∠ eoc.
In Fig. 7, left figure is the stroke that rocking arm roller moves in ∠ eoc section work done process, is the stroke that rocking arm roller moves in ∠ eod section work done process in the right figure of Fig. 7.Because that moves on output cam at ∠ eod section rocking arm roller is farther, thus be easy to valve stroke to adjust larger, because of this process, be continuous again, so reach the object of continuously variable valve lift with this.
In sum, the present invention can along with engine speed raise and continuously advanced timing, increase phase angle, increase valve stroke, this process is synchronous, can not change separately wherein one.If need in adjustment, change separately timing and need separately to join VVT.
Fig. 9 is whole structure figure, and air inlet eccentric cam shaft is parallel with exhaust cam shaft, does not affect like this installation timing chain, and Figure 10 is that split type cylinder cap cuts off, and is easy to like this install adjustment bent axle.
Claims (5)
1. engine continuous variable valve timing, phase place and a lift technology, by a bent axle, as adjusting axle, its lower shaft is arranged on cylinder cap, and upper axle is connected on an eccentric shaft by connecting rod as adjusting axle, and this eccentric shaft adjusts and fixation.On bent axle, axle has axle sleeve, axle sleeve is connected on another eccentric shaft by connecting rod, this eccentric shaft is done camshaft and is used, axle sleeve downside has output cam and axle sleeve to be fixedly linked, there is the rocking arm that connects valve axle sleeve below; on rocking arm, have rocking arm roller, the in the situation that of valve-closing, and rocking arm roller and bent axle lower shaft concentric.
2. continuous variable valve timing according to claim 1, phase place and lift technology, it is characterized in that, the eccentric shaft being connected with upper axle fixes and corrective action, the eccentric shaft being connected with axle sleeve is done camshaft, by timing chain, drive its rotation, its rotation drives axle sleeve by connecting rod, and axle sleeve moves reciprocatingly, and by the output cam contact rocking arm roller of axle sleeve downside, carrys out open and close valve.
3. continuous variable valve timing according to claim 1, phase place and lift technology, it is characterized in that, the eccentric shaft that is connected axle on bent axle by connecting rod can be adjusted according to engine speed, its rotation is adjusted and by axle on connecting rod band dynamic crankshaft, be take bent axle lower shaft and adjust as axle center, but its whole adjustment can not have influence on the eccentric shaft of doing camshaft, and the connecting rod that this eccentric shaft connects is relative constant with the coupling shaft position of axle sleeve, when therefore on bent axle, axle turns clockwise, axle sleeve can be rotated counterclockwise, and the output cam being fixedly linked with axle sleeve also can be rotated counterclockwise with axle sleeve, after being rotated counterclockwise, output cam will more approach rocking arm roller.Therefore, after adjusting, valve will be opened in advance and lag and close, and phase angle can become greatly, and timing meeting in advance.
4. continuous variable valve timing according to claim 3, phase place and lift technology, is characterized in that, can not change, so the to-and-fro motion angle of axle sleeve can not change yet as the eccentric shaft size of camshaft.In the situation that timing shifts to an earlier date, rocking arm roller can be done more physical exercises one section along output cam, thus valve can open larger.
5. continuous variable valve timing according to claim 3, phase place and lift technology, it is characterized in that, due to the situation lower shake-changing arm roller in valve-closing and bent axle lower shaft concentric, therefore when bent axle is adjusted, on bent axle, axle is equivalent to around the adjustment of rocking arm roller, so in the situation of valve-closing, before and after bent axle adjustment, rocking arm position can not become.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410279988.XA CN104131854B (en) | 2014-06-23 | 2014-06-23 | Technique capable of continuously changing timing, phase and lift of valve of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410279988.XA CN104131854B (en) | 2014-06-23 | 2014-06-23 | Technique capable of continuously changing timing, phase and lift of valve of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104131854A true CN104131854A (en) | 2014-11-05 |
| CN104131854B CN104131854B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410279988.XA Expired - Fee Related CN104131854B (en) | 2014-06-23 | 2014-06-23 | Technique capable of continuously changing timing, phase and lift of valve of engine |
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| CN (1) | CN104131854B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791045A (en) * | 2015-03-23 | 2015-07-22 | 朱譞晟 | Phase-difference type independently adjustable fully variable valve timing and lift range mechanism |
| CN106256996A (en) * | 2015-06-22 | 2016-12-28 | 现代自动车株式会社 | Continuous variable valve timing apparatus and be provided with the electromotor of this device |
| CN108036699A (en) * | 2017-11-24 | 2018-05-15 | 重庆长安汽车股份有限公司 | A kind of measuring system of continuously variable valve lift and port timing |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022075652A1 (en) * | 2020-10-07 | 2022-04-14 | 장순길 | Continuous variable valve lift device |
Citations (6)
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|---|---|---|---|---|
| DE10352677A1 (en) * | 2003-11-03 | 2005-06-02 | Hydraulik-Ring Gmbh | Variable valve lift device for internal combustion engine, has rotatable eccentric shaft having eccentrics contours positioned within circle formed by external diameter of bearings of eccentric shaft |
| KR20080044529A (en) * | 2006-11-16 | 2008-05-21 | 현대자동차주식회사 | Continuous variable valve lift apparatus |
| US20120192818A1 (en) * | 2011-01-27 | 2012-08-02 | Scuderi Group, Llc | Lost-motion variable valve actuation system with cam phaser |
| CN102777226A (en) * | 2012-07-23 | 2012-11-14 | 长城汽车股份有限公司 | Continuous variable valve stroke mechanism of engine |
| CN103266928A (en) * | 2013-05-23 | 2013-08-28 | 罗建民 | Two-in-one mechanism of continuous variable valve stroke and valve timing of automobile engine |
| CN203335166U (en) * | 2013-05-29 | 2013-12-11 | 长城汽车股份有限公司 | Variable valve lift mechanism of automobile engine air distribution system |
-
2014
- 2014-06-23 CN CN201410279988.XA patent/CN104131854B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10352677A1 (en) * | 2003-11-03 | 2005-06-02 | Hydraulik-Ring Gmbh | Variable valve lift device for internal combustion engine, has rotatable eccentric shaft having eccentrics contours positioned within circle formed by external diameter of bearings of eccentric shaft |
| KR20080044529A (en) * | 2006-11-16 | 2008-05-21 | 현대자동차주식회사 | Continuous variable valve lift apparatus |
| US20120192818A1 (en) * | 2011-01-27 | 2012-08-02 | Scuderi Group, Llc | Lost-motion variable valve actuation system with cam phaser |
| CN102777226A (en) * | 2012-07-23 | 2012-11-14 | 长城汽车股份有限公司 | Continuous variable valve stroke mechanism of engine |
| CN103266928A (en) * | 2013-05-23 | 2013-08-28 | 罗建民 | Two-in-one mechanism of continuous variable valve stroke and valve timing of automobile engine |
| CN203335166U (en) * | 2013-05-29 | 2013-12-11 | 长城汽车股份有限公司 | Variable valve lift mechanism of automobile engine air distribution system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791045A (en) * | 2015-03-23 | 2015-07-22 | 朱譞晟 | Phase-difference type independently adjustable fully variable valve timing and lift range mechanism |
| CN106256996A (en) * | 2015-06-22 | 2016-12-28 | 现代自动车株式会社 | Continuous variable valve timing apparatus and be provided with the electromotor of this device |
| US10480358B2 (en) | 2015-06-22 | 2019-11-19 | Hyundai Motor Company | Continuously variable valve timing apparatus and engine provided with the same |
| CN108036699A (en) * | 2017-11-24 | 2018-05-15 | 重庆长安汽车股份有限公司 | A kind of measuring system of continuously variable valve lift and port timing |
| CN108036699B (en) * | 2017-11-24 | 2020-01-14 | 重庆长安汽车股份有限公司 | Measuring system for continuously variable valve lift and valve timing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104131854B (en) | 2017-02-22 |
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